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O2 Sensor

This is a discussion on O2 Sensor within the X2/X4 Engine forums, part of the Yamaha Wolverine X2 & X4 847cc SxS category; I'm now at 6700 miles and 455 hours and I'd say since 6000 miles I've been noticing a slight power loss. Figured it was because ...

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Thread: O2 Sensor

  1. #1
    Super Moderator MassiveOverkill's Avatar
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    O2 Sensor

    I'm now at 6700 miles and 455 hours and I'd say since 6000 miles I've been noticing a slight power loss. Figured it was because she was getting old and tired. Then this morning I start her up and the CHECK ENGINE light came on!!



    After checking for loose connections, oil level, fuses I had a good hunch that my O2 sensor may be going south so I pulled it and soaked it in some brake cleaner, reinstalled and voila!! No more engine light. Took it for a ride and she runs nice and strong again.

    I'll probably order a new one but want to see how long this one goes. Surprisingly the O2 sensor was easy to remove. It takes a 17 mm wrench, which I conveniently don't have, so adjustable wrench was able to remove it without too much effort.



    Last edited by MassiveOverkill; 07-09-2019 at 09:22 PM.
    2018 Blue Wolverine X4
    First Wolverine X4 to break the 60 MPH barrier
    Over 6000 miles and 425 hours
    Hunterworks prototype sheave with easy cleanout port, 22 gram HV weights
    Weller Racing ECU flash
    HMF Titan Series Quiet slip-on Exhaust
    Walker Evans shocks
    Swiss-cheesed airbox lid
    NGK Laser Iridium spark plugs
    Tinkseal additives
    STI HD beadlocks wearing Tusk Terrabite 27x9x12 tires
    OEM windshield, soft cab, and roof
    OEM skid plates
    OEM rock sliders
    OEM A-arm guards
    OEM cargo box
    Check out the Yamaha X2/X4 FB group: https://www.facebook.com/groups/WolverineX2X4/

  2. #2
    Paper Boy
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    Quote Originally Posted by MassiveOverkill View Post
    I'm now at 6700 miles and 455 hours and I'd say since 6000 miles I've been noticing a slight power loss. Figured it was because she was getting old and tired. Then this morning I start her up and the CHECK ENGINE light came on!!



    After checking for loose connections, oil level, fuses I had a good hunch that my O2 sensor may be going south so I pulled it and soaked it in some brake cleaner, reinstalled and voila!! No more engine light. Took it for a ride and she runs nice and strong again.

    I'll probably order a new one but want to see how long this one goes. Surprisingly the O2 sensor was easy to remove. It takes a 17 mm wrench, which I conveniently don't have, so adjustable wrench was able to remove it without too much effort.



    Where’s it located?


    Sent from my iPad using Tapatalk

  3. #3
    Super Moderator MassiveOverkill's Avatar
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    It's on the driver side in the rear wheel well, it will be obvious when you see it.
    MORSNO likes this.
    2018 Blue Wolverine X4
    First Wolverine X4 to break the 60 MPH barrier
    Over 6000 miles and 425 hours
    Hunterworks prototype sheave with easy cleanout port, 22 gram HV weights
    Weller Racing ECU flash
    HMF Titan Series Quiet slip-on Exhaust
    Walker Evans shocks
    Swiss-cheesed airbox lid
    NGK Laser Iridium spark plugs
    Tinkseal additives
    STI HD beadlocks wearing Tusk Terrabite 27x9x12 tires
    OEM windshield, soft cab, and roof
    OEM skid plates
    OEM rock sliders
    OEM A-arm guards
    OEM cargo box
    Check out the Yamaha X2/X4 FB group: https://www.facebook.com/groups/WolverineX2X4/

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  5. #4
    Gear Grinder DWRAT's Avatar
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    6700 mile and getting tired???
    It's not a Polaris.
    2019 X2 SE Black
    29x9-14 all around.

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